Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 4 of 4 for “"Linear curvature"”.
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The Adaptive Optics Lucky Imager: combining adaptive optics and lucky imaging
… and a new type of wavefront sensor, the non-linear curvature wavefront sensor (nlCWFS), being used within the instrument. The development of the nlCWFS has been the focus of my work, bringing the technique from a theoretical concept to physical realisation at the WHT in September 2013. The …
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Mathematical modelling of asymmetrical metal rolling processes
… in these two models. Attention is then turned to curvature prediction. A review of workpiece curvature studies shows that contradictions exist in the literature; and complex non-linear relationships are seen to exist between asymmetries, roll geometry and induced curvature. The collated data from …
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Shape design using intrinsic geometry
… in terms of intrinsic parameters such as the curvature and torsion as a function of the arc length. The method of shape synthesis proposed here consists of selecting a shape model, defining a set of shape design variables and then evaluating the Cartesian coordinates of a curve. It is assumed …
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Analysing curved optical waveguides using the finite difference beam propagation method
… these waveguide bends with as small a radius of curvature as possible to allow many components to fit on the single PIC. Unfortunately, as the radius of curvature decreases, the power loss through the bend increases due to the waveguide’s fundamental mode shifting towards the outside of the bend, …